Lubricating device for bearings



Fgb. 12, 1929.

L. HOLLAND-LETZ LUBRICATING DEVICE FOR BEARINGS 2 Sheets-Sheet 1 Feb.12, 1929.

L. HOLLAND-LETZ LUBRICATING DEVICE FOR BEARINGS Filed Aprig 10, 192

2 Sheets-Sheet 2 l eitented Feb l2, i939.

s'r'res 1,791,535,; PATENT QFFIQ LUDl/VIG HGLLAND-LETZ, E CRQWN 'EOINT;INDIAIEA, ASSIG-NOR TO THE LETZ MANU- FAGTURING COMPANY, A. COBEQRATION01* INBIANA.

'LUBnroA- rrne nnvxor: rel-t sni nrnes.

Application filed April 10,

ring; is operatively connected with means for lubricating; the bearing;

A further object of the invention is to provide an improved form oflubricating device tor a bearing; in which he excess lubricant suppliedto the hearing is auton'iutically returned to the lubricatingsupplychamber.

A further object of the i1 vention is to provide an improved endtl'irust bearing for e shei t which can be eas ly and quickly assembledin the manufacturethere A still further object. of the invention is toprovide an improved 'l'orlnoi self aligning bearing in connectlon withmy improved lubricating device These and other objects are accomplishedby providing a construction and arrangement of the various parts in themanner hereinaiiter described and particularly pointed out in theappended churns.

Referring to the drawings, Fig. 1 tea longitudinal vertical view partlyin section oi a portion or a feed inill showinginy improved lubricatingdevice and bearing mounted therein.

2 is sectionel view taken on the lines Q gin Fig. l and looking; in thedirection indic ted by the arrows.

Fig, 3 a cross sectional view taken on o the lines 3-3 in 1 looking inthe direc tion indicated by the arrows.

Fig. l-

a, pers iectiv-e *iev of one ot the ball bearing races and Fig. 5 is a,perspective view of my improved f: :t'ornrot ball bearing retainingrings.

For the purpose of illustration l have shown rny improved lubricatingdevice and bearing connection with a feed nill, but it will beunderstood that the herein described invention may be used in connectionwith va 'ious other types oi: machines. The grindingg; inill showing theimprovement comprises a buhrcesinp; which is secured to the frame of themill in eny well known manner and provided witha centrelly' disposedopening 2 s r l v ones- 11 which is adapted to have extendingtherethrough a feeding ineinber 12 and-shaft 13 to which the feedingI1191X1l3FlSSeCLlTed The buhr casing lll is provided with a peripheralflange i l forming a housing for the grinding buhrs off the mill. i Lthe flange 14 of the casing 10 at regularly spaced intervals about theperiphery thereof are a plurality of bosses 15, only one of which shown,having longitudinal apertures 15 extending therethrough. Extendingthrough the uperturesl6 of the bosses 15 are bolts 17 which securecorresponding bosses 18 of the cap or cover 19 to the bulir casing 10.The

-cover 19. is provided with a recess 20 which interineshes with ecorrespondingrib 21 it the flange 1& and thereby insures a firmlysecured] housing for the grinding buhrs. h iounted in the buhr casing 10and preferably on horizontal pivots, not shownyis' a. buhr holder ring22. Pivotally inountedby means oi vertical'pins, 23 a rocking plateholder 24, Secured to the plate holder 2% by means otbolts, not shown,1s the usual relatively stationary buhr 25. Positioned opposite Elliebuhr 25 is the rotat ng buhr 526 which is sccured by means of bolts 27to the rotating buhr holder 28, which, in turn, is secured to the" shaft13 by means of a pin 29. The con-- struction, of grinding inill abovedescribed is well known in the art and per se forms no part of thepresent invention, and for this reason it is thought unnecessary todescribe the sanie in more detail.

In the type of machine above described it will b e'unders ood that whenthe machine is run. at ta relatively high capacity the end thrust on}the shaft byreeson o'l'the' grain being. ground between the grindingbuhrs is considerable and it has been diliicultto design 2; bearing anda lubricating device which will neet the requirement of the tren'iendouswear on e bearingpositioned at the end ot the shaft. Que of theimportant features of my -invention the provision of a lubricaoing do!vice and bearing construction in which the lubricant is automaticallysupplied to the bearing and all excesslubricant supplied. to the bearingis returned to the lubricating supply chamber. i

'lhis improvedlubriceting device and bear- Formed integrally with r hLively:reduced bearing portion formed ntegrallytherewith. The

in iz compri es an adjustable bearing br cket lor the purposehereinafter set forth.

.;-\\'hich the ba l bearin s revolve.

bearing portion 32 of the adjustable bearing bracket is preferablymachined and adapted to be slidingly adjusted in a centrally disposedbore 33 in a boss 34 of the cap or cover 19 of the mill, and the bearingportions 31 and 32 ot' the adjustable bracket 30 are provided with a.soft metal bushing 35 in whichthe shaft 13 rotates. The bearing bracket30 is provided with longitudii ally extending offset a his 36 and 37.Formed integrally with the arms 36 and 37 of the bracket 30 is caringportion 38 which forms a bearing for the extreme outer end of the shatt13. Formed integrally with the arms 36 and 37 ot the bracket 30 andimmediately )(jlOWl'llQ bearing portioi 88 is a lubricant supply chamber39 which is provided with adrain plug lO. The bearing portion 38 of thebracket 30 is provided with, adjacent its inner end, a peripheral groove41 The groove ail. of the bearing portion 38 communicates with thelubricant supply chamber 39 by an aperture torinc Q in the bottomoi thebearing portion 38. 'lhe outer end of the bearing portion 3-8 isprovided with a cylindrical recess portion as shown at as, of achaineter relatively larger than the diameter of the shaft 13 Theadjustable l caring bracket 30 is reccssech as shown at 4%, just beyondthe outer end of the bearing portion 38 to form a compartment forencasing my improved lubricatiirc device and bearing construction. Thecash g or housing for my improved lubricating and bearing constructionis proded with an end thrust member or plate 4i5,'

which is secured to the adjustable bearing bracket 30 by three bolts 4bas clearly shown in Figs. 1, 2 and The end thrust plate is provided withan inclined passageway 47, which leads to ie lubricant chamber 89 fornn; and v e\ lilO level of the lubricant. pz-issap'ewa -T is provi ledwith the usual p'ug' The end thrxst j lite has its inner side aninwarely projecti rib torininc; a cylindncal re- "rally ot' the plate.The cylindrical plate l5 corresponds with the recess oi oi wecylindrical c portion 35% ct th which are whip-red to receive ballbearing; races 5! and 5:2. respectively. The ball bearre i'ormed in thebearing inc races and are ru'ovided with the usual rircular tracks 52-7;which define the path in 'l he ball bearings 541i. which th re are tour,in number. are mounted in ball retaining rings 55 and 56 which areconstructed in a manner to support the balls in relatively spacedrelation with r spect to each other and an s cured together by rivets57. Each of the ball retainin r rings 55 and 56 is j rovided on itsouter 1 with annular ices and and ereby form cylindrical recesses 60 clindrical recesses 60 and (ll-oi co ti 3157. and 61.

c bearing bracket 30, both of the ball retaining rings 56 and 55 rspective-- ly, are adapted to receive the inner faces of the ball races51 and 52, as clearly shown in l of the drawings. In the construction ofthe ball retaining rings 55 and 56 and the recesses 60 and 61 formedtherein, sufiicient space between these recesses and the ball races 51.and 52, as shown at 62 and 63, has been provided to permit the lubricantwhic sprayed by the lubricating device or carried by the revolving ballbea retaining rings to flow into these spaces 62 and 63 and lubricatethe bearing.

It will also b noted by referring to rig. 1 that the annular flange 58as well as the nular flange 59 of the ball retaining rings 56 and 55,respectively. are suliiciently spaced from either side of the casing topermit the lubricant to be supplied to the bearing.

In order to additionally the. lubricant to reach the bearing 1 haveprovided cut away portions as shown at 6% and 65 in each of the the ballbearing ret n at 67.

a L ell formed in the bearing por- 1011 31 oi? the bearing bracket 30and when there is any excess lubricant supplied through the space formedbetween the ball bearing and the cylindrical chamber 13 it will race 4pass inwardly on the shaft and be discharged by the peripheral flange 67into the groove 4-1 formed in he bearing portion 88, from when ce it will discharged through the openbat-l; to he lubricant supply chamber jroperlysupply the lubricent to my improved bearing construction I haveprovided a luliiricant wheel in the t w giearas shown at 68. which n blseated in bearings (1., respecti elv. on t 1Q opposite sides of "helubricant chamber The gear 68 is r I lei with a re. atively long hub asshown a I adapted to contact with the oppo- V lubri ating chamber 39 inpreiuo; ts displacement therefrom. The

above da cription it will be read-- it v. ucn the iillffl'lCtlll l ischamber 3 l be practically subnierrger ,1 1, ii) is operatively drivenat a ced the oil \Vlll be sprayed b i I teeth filll'lliliil e and 59 ofthe bearin ball retaings 56 and 05, and on the walls inc lJtll'lIl'fl:colhpzirliinent iii where it will pass into all openings surrounding thebearing ancl through the cut zix'vey portions 6 and 65 (if the ballbearing; retaining 1" G and i'eepectively, from wheir it w .1 esupplied. in the ball liiezzi-ine's and races 5'1. and 52.

if will be further iietccl from the above Ce- &-L'Il])i'l()l1 that myllilUlfJVOfil lllb fihftliln' vice and bearing ceiw -i'ucl ien caneasily and quickly be assembled by posil ioning the hub 72 of the gear68 in registering: zil nmexli with the b 5 l])Qll1lllLS Z. anal ii ofthe hibi'i 'amt CllP'ilbPl 39 and inseriing the pin (59. 'lhen bypositioning the ball face 52 in the cylinihi nil irecees 4-8 M" thehearing per-- lien 38 maul pi. 7' v1mg; lihc ball bearings ceg'el'l-iei' with their retaining l'lT-(IQS :iiul 56 in operative iclutienwith the gear wheel. 68

I (so with the bearing balls in the race way of the hell we, 52 and lhcn 'peiiiuieniiw the bull race 'l in the recess 50 l e! lhe cc '8?!plate 4-5 the i can he semiiwl h 7 bells l6 lo the bear ng bracket 30.Ry thic. aii'zmpgcmei it will readily be that l have itievidecl acansli-n :iion whicl is easily marl quickly s The ha l aligning:nailiushible learn hxi he? 30 is; suc ieifeil in it's position by :1

1 yoke nien'iliei' '7 which s11 liOllllLlS l'he bearing hi'uclzet 3Oailj'z'icezili the bearing;- poi-ltion Lhci'eoi and is provided withFaen'ii-ciiculm" lugs 7 which are positioned on the opposite sidesthereof and MllDlGCl ii engage 032 00-- sifcly (li gosed pins 76 whichare foiiiiesl inmg: ally with the liem-ing'poi-lien. 231 01' {hemljijisi'ablc bearing bracket 30. By this censliuction it will be holedthat the yche 74 is flllClIliDECl by means: (if th se se1ni-cii'culln 9175 ("0 the adjustable bei'iriiipg bllfilflit :iml

upper and lowei' 1i 4 VhlO-Cl adjacent its c w ifh bow 2". and 75%which. in him. .iein'cvieed with lengi il iul'innllv ext nding ape-{l1and resgiecfgiwlx Exlcmlii lhic 1 viii.

0 i J 4- ol. 812d hum wile:

ling bub 2's anti-frictieh bearing ccii' prieing of be .'illg' bells anda v for, anal means opei'aiively driven by Said axis with respectll')the relatively st'al i01m i'y buhr 25 by oscillating (L crank handle 89j l felled 031 the Stud S2 and hai ing 01 .p0 snlvely disposed (Jammingsurfaces 90, which pending cam surfaces 91 mcmml on the Olll'Gl' side ofand adjacent i'he buss I8 oi? the 'olae74r. T he crank hmiclle 89 is :2'zipteil in be adjusted longiiucliimlly 011 the SlilMl 82 by 21 hand.wheel 92', which is in "hr-sailed engagement with the stud 82 and islocked in paredeiei'miiied positions oil :ulju'scwent by a locking mmscrew 93. From the alieve ilcsci'iptien it will be readily seen that asthe crank handle 89 is oscillated in m"- ieclieii cause the cnmminp;surf-Lures to al Vance toward one another the yoke iiieiiiher 74c andpziilicuhii'ly the upper end thereof will rm mg oulwzuuly with iespectlo we mill :iheut lhe boss 77 on the slml 81 a conic-1;. Lech 'flUlS 9%are provided in prevent the coinp'i'cssicn spring 86 from forcing thelower eml of the yoke member e 4: inward the mill when he crank handleis; omilluteill o permit l'he yoke member to swing o'utivzii-(lly as :1out- 901 men that by el dingly unclealius mounfimg the bet 2c inactionof the a l jllSlfLlDlG liiezii'ine bracket- 30 in the here 33 of thecover plate 1912.116. by zicl iiis teb'qw sup porting the bearingbracket 39 by the fulcrum T '74. i" T In 1: -1 l *7 1 q ence me .i 1; epimieec a! noble um improved means of a self aligning: and ii m iusleblebearing bracket which can be read ily "illzlll'illflllfl i 'fl to pei'minicl insiahle bearing bi'zicket as well the s cl? gaivi'iecl the-Feb? tohe moved 10mm 1: ii: 69]

l he Ulnfl he S'rllllG is capable of himlificatiei; um ilmlificaitie'nmay be lfilflfilfilllliflili ileingif'l mm the spii'i'i and scope of thein- Ven ion as exmessecl. in the following claims. What I claim as myinvention and desire 50 secure by Letters Patent is:

l. In a hibi'iczii'ihcg (levicm the cm wll'h :1 shall? cl beru'm g fer:iiil'i-i riciiriii encl 'l'ln'uell 1 Q 1 ppiyingi inb- A l suwl(Hillrlczim' to mid bearing. v

In a lubricatn'ig clevi'cc. l'hecombination with :1 shaft, of 21 lcaring for Saul shaft. 211

retaining mil the ring thei'eall) iii)

supplying a lubricant t said bearing.

a r g 1 aun 1,; i. in a in iica nig (Lu/ice, ac com ma tion with ashaft, ol :2 bearing for said shaft, an one thrust anti ricrion bearingassociated with said mentioned bearing and said shaft, saidanri-fr'ction bearing conipris' a plurality of bearing balls and aretain g ring therefor, said retaining; ring operated in connection witha l bri r lug sgray wheel r t in the form of a gear nos ling with theteeth on said ring for spraying a lubricant to said bearing.

5. In a lubric; ting; device, the combination with a shal of anadjustable bearing bracket for supporting; one end oi raid shalt, ananti-friction bearin mounted in said bracket and operatively related tosaid shalt, a lubricant supply chamber formed integrally witl saidbracket, a lubr cating spraying wheel operati'vely related with saidanti-friction beari 5: and positioned in said lubricant supply chainberfor spraying lubricant on said anti-friction bearing and on the bearingfor said shaft.

6. In a lubricating device, the combination with a shaft, of anadjustable bearing bracl for supporting one end of said sl aft, anfilial friction bearing mounted said bracket and opcratively related tosai: malt, said antifriction bearing conuprisin;

a plurality of bearing balls a d retainin rings therefor, one of saicregainin ran lJGlllQ provided with 'car teeth a lub can: sunol chamber av i i J it, a lubriforined intc pially with said braclte hing; withcatin s na 7 wheel having" teeth 11 es the teeth in the retaining ringan l positioned in said supply chau'iber for spraying a ll 'lant on saidanti-friction bearing and on the bearing for said shaft.

7. In a lubricating device, the combination with a. snail, oi"? an adj:stahlo self-aligning bearing bracket for Sllppflllllllg one end or saidshall, there being a circular recess formed in the mid of said bearing b'aclrct adjacent the end of said .s' 5, a ball bearing race positionedin arid ici s, a removable plate secured to said braclfot and having aircular recess adapteo to receive a ball bearing race, an anti-frictionbearing comprising a plurality of bearing balls and retalning ringspositioned between ball bearing; races a lubricant supply chamber formedintegrally with said bracket and positioned below anti-friction bearing,and a lubri catingspray wheel opcrativcly related to said anti-frictionbearing and positioned in said luln'icant sup ply chamber for, supplyinga lubricant to said anti-friction bearing and to 'he bearing for saidshaft.

8. In a lubricating device, the combination with a shaft, of anadjustable self-aligning bearing bracket for supporting one end of saidshaft, there being a circular recess formed in the end of said bearingbracket adiacent the end of said shaft, a ball bearing race p sitionedin paid recess, a removable p'ate secured to said bracket and having acircular recess adi pted to receive a ball bearing; race, ananti-"friction bearing comprising a plurality of bearing balls andretaining 'ings positioned between said ball bearing races one of saidballretaining rings being provi ed with gear teeth, a lubricant supplychamber formed integrally with said bracket and positioned below saidanti-friction hearing, and a lubricati spray wheel positioned in. saiclubricant svly chamber and having; gear teeth meshing A u the gear teethon said retaining ring; for supplying; a lubricant to said anti-frictionbearing and to the bearing for said shaft. 1

9. In a lubricating device, the combination with a shaft, of anadjustable self-aligning bearino' bracket for supporting one end of alt,t iere being a circular recess in the end of said bearing bracket he endof said shalt, a ball bearing doned in said recess, a removable securedto said bracket and having a .r recess 1 dapted to receive a ballbearing; race an nti-friction bearing comprising rely related to saidsupplying lubricantto icvice the combination u HA1 for said shall, anprising a retain 1-; associated with and said shall, ralivcly driveivering a lui, tstiiuony whereof I have

